Fish screen



J. L. WALKER.

FISH SCREEN. APPLICATION FILED JUNE 3, 1920.

Patented June 20,

2 SHEETS-SHEET I.

gin 0W J. L. WALKER.

FISH SCREEN.

APPLICATION FILED JUNE 3, 1920.

Patented June 20, 1922.

2 SHEETS-SHEET 2.

T T E F JAMES L. WALKER, OF UNION, UTAH.

FISH SCREEN.

Application filed June 3,

To all whom it may concern:

-Be it known that L'JAMES, L. WALKER, a citizen of the United States, residing at Union, in the county of Salt Lake and State of Utah, have invented certain new and useful Improvements in Fish Screens, of which the following is a specification.

The present invention relates to means for preventing the passage of fish beyond a predetermined point in a stream or water-way.

The object is to provide an effective structure for this purpose that'will clear itself of leaves, sticks and other trash which may be carried by the stream.

An embodiment that has proven entirely practicable for the purpose is illustrated in the accompanying drawings, wherein Figure l is a plan view showing the mechanism in place,

Figure 2 is a vertical longitudinal sectional View,

Figure 3 is a cross sectional view on an enlarged scale and taken on the line 3-3 of Figure 1,

Figure 4 is a detail longitudinal sectional view,

Figure 5 is a cross sectional view of the motor,

Figure 6 is a detail longitudinal sectional view through a portion of the same,

Figure 7 is a perspective view of one of the bearing members,

Figure 8 is a corresponding view of one of the end guards.

In the embodiment disclosed two abutments 9 and 10 are placed on opposite sides of the stream, designated 11, and while shown of concrete, may be of any suitable material. The abutments are preferably connected by a bed 12, over which the stream flows. The abutment 10 includes a boxing 13 from which extends an elongated casing 1 1, these various parts being preferably, though not necessarily, integral and of concrete.

Journaled in boxes 15 suitably mounted on the abutments 9 and 10, is a shaft 16 carrying suitable spacing disks 17 that are surrounded by a cylindrical screen 18, said screen extending from close to the bed 12 to a point well above the surface of the stream, so as to insure an obstruction across the same, even in its flood stages. The end of the shaft 16 projects into the boxing 13, and is provided with a gear wheel 19 that is in mesh ith a smaller gear 20 carried by a Specification of Letters Eate'nt. Patented Jun 20 1922 1920. Seria1 No. 386,216.

shaft 21 that is located longitudinally in the casing 14. This shaft 21 constitutes part of a water motor provided with tangential blades 22 preferably curved, as illustrated more particularly in Figure 5. The buckets thus produced are preferably provided with end walls in the form of disks 23.

Leading from any suitable source, as for example, from the stream above the screen, is a supply conduit 24 having a discharge nozzle 25 that delivers into the buckets of the motor, as illustrated in Figure 1. It will be noted that the motor rotates in a direction to turn the screen so that the up-stream-side of said screen moves upwardly and thus floating material carried by the stream and lodging against the screen, will be carried over the screen, and as the rearward surface moves downwardly and submerges, the current will remove the collected debris, thus clearing the screen. In order to insure a properly fish-proof joint between the bottom and the screen, a guard bar 26 preferably extends longitudinally along the under side of the screen but on the upstream side of a vertical plane passing through its axis of rotation, and to prevent the lodgement of sticks and trash at the ends of the screen as well as to provide a proper guard against the passage of fish, curved bars 27, connected to the ends of the bar 26, have flanges 28 adjustably bolted, as shown at 29 in Figure 3, to angle plates 30 suitably mounted on the abutments 9 and 10.

By having the water motor at the end of the screen, a very compact arrangement is provided, and one in which the motor is readily accessible. Moreover, it can be completely housed. The utilization of a supply conduit, as 2-1, is also advantageous, in that it insures a uniform supply of water to the motor, irrespective of the variation in the stream due to freshets or low water. Furthermore the motor is protected from debris carried down-stream.

From the foregoing, it is thought that the construction, operation and many advantages of the herein described invention will be apparent to those skilled in the art without further description, and it will be understood that. various changes in the size, shape, proportion andminor details of construction may be resorted to without departing from the spirit or sacrificing any of the advantages of the invention.

Having thus fully described my invention,

what I claim as new, and desire to secure by Letters Patent, is

1. In apparatus of the character set forth,

a the combination with abutments on opposite sides of the stream, of a rotatable screen journaled on the abutments, guards mounted on the abutments at the ends of the screen, and a guard base secured to the end guards and held in place thereby between the lower portion of the screen and the bottom of the stream;

2. Inapparatus of thecharacter set forth, the combination with abutments on opposite sides of the stream, of 'a rotatable screen journaled on the abutments, guards mounted on the abutments at the ends of the screen and adjustable with respect to the screen, and a guard base secured to the end guards and adjustable therewith, said guard bar being located between the lower portion of the screen and the'bottom of the stream.

3. A fish screen for streams comprising a screen located within and extending transversely of the stream, a motor located outside of the stream, a conduit conveying water from the stream above the screen to the motor, a conduit carrying Water from the motor back to the stream below the screen, and a driving connection between the motor and screen.

4. A fish screen for streams comprising a screen located within and extending transversely of the stream, a motor located outside of the stream and wholly above the bed thereof, a conduit conveying water from the stream above the screen to the motor, a conduit carrying Water from the motor back to the stream below the screen, and a driving connection between the motor and screen.

5. A fish screen for streams comprisinga screen located within and extending transan intermittent rotary motion to the screen and located outside of the stream, a conduit carrying water from the streamabove the screen to the motor, a conduit carrying water from the motor back to the stream below the screen, and a driving connection between the motor and the screen.

In testimony whereof, I aflix my signature in the presence of two witnesses.

JAMES L. WALKER. Witnesses N. VAN DAM, J11, MIRIAM Y. WELLS. 

